Typical MUDs and other predecessor games were limited to about 64 or 256 simultaneous player connections; this was a limit imposed by the underlying operating system, which was usually Unix-like. One of the bigger problems with the modern engines has been handling the vast number of players. Since a typical server can handle around 10,000–12,000 players, 4000–5000 active simultaneously, dividing the game into several servers has up until now been the solution. This approach has also helped with technical issues, such as lag, that many players experience. Another difficulty, especially relevant to real-time simulation games, is time synchronization across hundreds or thousands of players. Many games rely on time synchronization to drive their physics simulation as well as their scoring and damage detection.
Run virtual errands. If you have a computer with Internet connection and are good at searching the Web and communicating with others, you can become a virtual personal assistant with Fancy Hands. The service hires assistants, who set their own hours, to help its users tackle tasks such as making calls to service providers, scheduling appointments, and finding the best prices for services and products. You get paid per task, starting at between $3 and $7.

The underlying idea is that investors require a rate of return from their resources – i.e. equity – under the control of the firm's management, compensating them for their opportunity cost and accounting for the level of risk resulting. This rate of return is the cost of equity, and a formal equity cost must be subtracted from net income. Consequently, to create shareholder value, management must generate returns at least as great as this cost. Thus, although a company may report a profit on its income statement, it may actually be economically unprofitable; see Economic profit. It is thus possible that a value deemed positive using a traditional discounted cash flow (DCF) approach may be negative here. RI-based valuation is therefore a valuable complement to more traditional techniques.
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World of Warcraft is a dominant MMOG with 8-9 million monthly subscribers worldwide.[when?][citation needed] The subscriber base dropped by 1 million after the expansion Wrath of the Lich King, bringing it to 9 million subscribers in 2010,[3] though it remained the most popular Western title among MMOGs. In 2008, Western consumer spending on World of Warcraft represented a 58% share of the subscription MMOG market in 2009.[4] The title has generated over $2.2 billion in cumulative consumer spending on subscriptions from 2005 through 2009.[4]
If you have graphic design skills then you could make money online by creating and selling your own design elements, like templates, fonts, graphics, and other assets. This is a great way to earn extra money, and build up a portfolio of work, which could lead to you picking up freelance graphic design jobs. Websites like Envato Elements pay you a fee per element sold, which can become quite profitable if your work is popular.
E-books represent about 20 percent of all book sales in the U.S. The good news is you don’t have to be a publisher with deep pockets to get in on the action. As a solo internet entrepreneur, you can sell ebooks directly from your own website. You can sell your own works or sell a public domain work. Simply upload it to your website (or seller account on Amazon) and start publicizing it on your social media platforms, on your email list, your blog, website, etc.
Anyone who has ever googled “work from home” or “make money from home” knows that the web is overflowing with sites proclaiming you can make thousands from the comfort of your living room, most of the time requiring you to first buy a book, CD, or DVD to learn how.  Since there is so much of this garbage out there, it can be frustrating looking for legitimate ways to work from home.  Below are some reasonable ideas to consider.
My 10-year-old son brought home a book from our park’s free library box. It was a biology textbook – teachers edition. He said it looked interesting and hey, it was free (having no idea you could sell it). I scanned it in my Amazon seller app and realized it was worth around $150. He was so excited. We listed it for sale for $130 and it sold! Going to tell him, he just made $130!
WeReward: This iPhone and Android app allows you to complete small tasks (ex. taking a photo of yourself with your favorite beverage or eating at a new establishment) for points that translate to cash. Though the per-task reward is small, there are millions of participating businesses and the points can add up quickly. The location-based rewards are best if you already have an active lifestyle and won’t have to force yourself to starting eating/drinking out all the time.

Greg Johnson is a personal finance and frugal travel expert who leveraged his online business to quit his 9-5 job, spend more time with his family, and travel the world. With his wife Holly, Greg co-owns two websites – Club Thrifty and Travel Blue Book. The couple has also co-authored a book, Zero Down Your Debt: Reclaim Your Income and Build a Life You'll Love. Find him on Instagram, Facebook, and Twitter @ClubThrifty.

Market your course: The beauty of using a course to make money online is that you can continue to sell it for as long as you’d like. Look for niche communities on Facebook, LinkedIn, or Reddit that might benefit from your content. Guest post on relevant blogs and sites. Look for anywhere you might be able to get in front of the right people. With just a few hours a month you can continue to generate sales.
There are few ways to make money while you shop. You can pick up short tasks that involve shopping, like doing price checks or photographing in stores or you can go mystery shopping. Mystery shopping is definitely a real way to make money but you have to be careful because the jobs can be the bait for scams, so you have to know the signs of mystery shopping scams. But there are legitimate companies that hire mystery shoppers. 
One factor that you must be aware of though is that Care.com is a peer-to-peer arrangement. That means that you will be in direct competition with other pet sitters in your area. You must price your services competitively in order to get business. Once you begin to develop a list of regular clients, you will be in a better position to raise your rates. This will be particularly true as you get referrals from those customers.
I recently stumbled on the Trim app and I have to say, this one is a game changer. It’s a simple app that acts as your own personal financial manager. Once you link your bank to the app, Trim analyzes your spending, finds subscriptions you need to cancel, negotiates your Comcast bill, finds you better car insurance, and more. And of course, the app is free! My bet is that it will only take a few days for Trim to put an extra $100 in your pocket. So easy!
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